<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>水平框架</title>
  <frameset rows="25%,50%,25%">
    <frame src="/Day01/examplexample/a.html">
    <frame src="/Day01/examplexample/b.html">
    <frame src="/Day01/examplexample/c.html">
  </frameset>
</head>
<body>
</body>
</html>